hazelton



(No Model.)

M. W. HAZELTON.

, STEAM BOILER- No. 310,891. Patented Jan. 20, 1885.

WITNESSES:

. E WI'NZEITOR ATTORNEY UNTTED STaTEs PATENT @FFllQE.

MILTON \V. HAZELTON, OF NEW YORK, N. Y., ASSIGNOR OF ONEHALF TO E. S. T. KENNEDY, OF SAME PLACE.

STEAM- SPECIFICATION forming part of Letters Patent No. 310,891. dated January 20, 1885.

Application filed March 6, 1884. Renewed December 15, 188-1. (No model.)

To all whom it may concern.-

Be it known that I, MILTON WV. HAZELTON, a citizen of the United States of North America, and a resident of the city, county, and State of New York, have invented a new and useful Improvement in Steam-Boilers, of which the following is a specification.

This invention is designed as an improvement on the boiler for which Letters Patent of the United States No. 247,910 were issued to me October 4, 1881; and its object is to provide a boiler especially adapted to deliver dry or superheated steam.

The invention consists in the combination, with a boiler, preferably of the upright type, and forming part thereof, of a series of tubes radiating into the hot-air chamber from the steam-chamber of the boiler, and having their outer ends closed, and of series of open-ended smaller tubes radiating from the steam-delivcry pipe into the steam-chamber tubes, where by very extensive steam heating or drying surface is secured.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is apartly-sectional side elevation of my improved boiler. Fig. 2 is a sectional plan of the same on lines m as, Fig. 1.

In the drawings, A represents the upright boiler-cylinder, provided with manholes a a. 13 represents the feed-water pipe, and B the blow-off pipe and cook.

From about on a level With the roof of the fire-box O, nearly to the water-line b of the boiler, the space within the boiler-inclosing walls or shell D is filled with series of tubes E, closed at their outer ends and radiating from the cylinder A in successive planes, one above the other, the tubes and spaces of the several series alternating with each other, as indicated in Fig. 2. From the steam-cham her A of the boiler other series of tubes, F, closed at their outer ends, radiate in successive planes one above the other. The steam-delivery pipe G is fixed with its vertical leg in the longitudinal axis of the steam-chamber, and with its horizontal leg extending out through a side of the steam-chamber, its end within said chamber being closed, as shown at c, Fig. 1. From the vertical leg of this steainpipe G a series ot'open-ended tubes, H, radiate in successive planes and enter the tubes F, so that the steam must enter the tubes F from the stcam-chamber A, and then pass into the tubes H, and thence into the steam-pipe G, before escaping from the boiler. By this arrangement it will be seen that the steam, before escaping, is subdivided into many distinct and individual columns or jets, that are separately exposed in the tubes F to the heat of the products of combustion as they pass up through the hot-air chamber from the fire-box C. These tubes F H may be indefinitely multiplied. and may be an ranged, in combination with the steam-delivcry pipe, to apply to boiler steam-chambers of other forms of construction than that herein shown, the purpose being to apply them in sufficient numbers and of sufficient dimensions to enable the steam to absorb and there by to make use of a very considerable portion of the heat that would otherwise escape up the smoke-stack. In this instance the boilerinclosing walls Dare designed to be prolonged into the boiler-flue or smokestack, and the side opening, K, may be made available for conveniently getting at the boiler for inspection and repairs; but the walls D may be closed in at the top and a smoke-pipe may be inserted in the opening K.

I am aware that there are many steam heating and drying devices in use, but know of none so effective and at the same time so simple as this.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with the steam-chamber of a boiler and the steam-delivery pipe closed at its inner end, of a seriesof tubes with closed outer ends radiating from the steam-chamber into a hot-air chamber, and a series of smaller open-ended tubes radiating from the steam-delivery pipe into the said steamchamber tubes, substantially as and for the purposes set forth.

2. The method substantially as herein described of drying or superheating steam, consisting in subdividing the mass of steam into many distinct and individual columns or jets In testimony that I claim the foregoing as and exposing them to heat by causing the my invention I have signed my name, in pressteam from the steam-chamber to enter aseries ence of two witnesses, this 19th day of Februof tubes radiating therefr01n,and then to pass my, 1881. 5 into tubes that radiate from the steam-delivery pipeinto the steam-chamber tubes, and thence M. W'. .HAZELTON. into the steam delivery pipe, said steamchamber and the tubes radiating therefrom Vitnesses: being exposed to heat in a hot-air chamber, as JACOB J. STORER,

IO set forth. ALBERT P. MORIARTY. 

